It's a free country and your welcome to whatever theological interpretation you want no matter how wrong it is....
As far as Christianity goes Paul's writings are authoritative. He was a theological clarifier of issues back in the day (of the NT being written) and is so even more so today.
As far as your challenge goes, your interpretation is invalid because they while they do get the same thing as far as the basic gist of things goes (Both people escape Gehenna and get eternal bliss) there are nuances... And to say differently is a bit of a strawman.
1) Hopefully you have some background in philosophy, but if not you should learn about Stoicism and the commonalities between Christian thought and it (which are several). In Stoicism the ideal of life was to live a noble life according to the 4 cardinal virtues (wisdom, morality, courage, and moderation). In Christianity the viewpoint is much the same, except their is a unique theology that goes with the philosophy and of course the list of virtues is different based on Bible passages rather than Hellenic culture.
Anyway if you don't know about Stoicism then you really should study it.
If you don't then its almost a waste of time talking to Christians on why they think this or that when Stoic like thinking tends to be at root of much of what they say and do.
2) There are other kinds of objections that I could make on why your opinion is wrong based on
A) what the Bible says empirically speaking on subjects like this etc. or
B) based on how theology has been conducted in the Judeo-Christian Tradition for the last 2700 years or so (going back to at least King Hezekiah of ancient Israel), but for the time being I won't bother with that.
(OK on second thought I will add this brief easy objection)
But back to your original point,
there are some passages in the Bible that suggest that not all people will be equal in heaven like Matthew 18:1, Matthew 20:21, Revelation 4:10, so I see not reason on why saint Paul is wrong in 1 Corinthians 3... Especially when God promises in both the OT & NT to repay unto us "according to our deeds" numerous times.
Matthew 25:14-30
14 ¶For the kingdom of heaven is as a man travelling into a far country, who called his own servants, and delivered unto them his goods.
15 And unto one he gave five talents, to another two, and to another one; to every man according to his several ability; and straightway took his journey.
16 Then he that had received the five talents went and traded with the same, and made them other five talents.
17 And likewise he that had received two, he also gained other two.
18 But he that had received one went and digged in the earth, and hid his lord’s money.
19 After a long time the lord of those servants cometh, and reckoneth with them.
20 And so he that had received five talents came and brought other five talents, saying, Lord, thou deliveredst unto me five talents: behold, I have gained beside them five talents more.
21 His lord said unto him, Well done, thou good and faithful servant: thou hast been faithful over a few things, I will make thee ruler over many things: enter thou into the joy of thy lord.
22 He also that had received two talents came and said, Lord, thou deliveredst unto me two talents: behold, I have gained two other talents beside them.
23 His lord said unto him, Well done, good and faithful servant; thou hast been faithful over a few things, I will make thee ruler over many things: enter thou into the joy of thy lord.
24 Then he which had received the one talent came and said, Lord, I knew thee that thou art an hard man, reaping where thou hast not sown, and gathering where thou hast not strawed:
25 And I was afraid, and went and hid thy talent in the earth: lo, there thou hast that is thine.
26 His lord answered and said unto him, Thou wicked and slothful servant, thou knewest that I reap where I sowed not, and gather where I have not strawed:
27 Thou oughtest therefore to have put my money to the exchangers, and then at my coming I should have received mine own with usury.
28 Take therefore the talent from him, and give it unto him which hath ten talents.
29 For unto every one that hath shall be given, and he shall have abundance: but from him that hath not shall be taken away even that which he hath.
30 And cast ye the unprofitable servant into outer darkness: there shall be weeping and gnashing of teeth.