I remember seeing once a program able to edit every single detail from the game, including stages, bosses, enemies, graphics... here's said program, by the way:
http://www.romhacking.net/utiliti...
It'd be nice to see someone use it to combine the best of both versions.

this is something to admire and respect!!

kudos! (y)

The tool you posted was used to make. Monster Party Lets go Again hack.. Its amazing you should check it out.

Oh my god...I've been waiting for this my whole life dude.

I speedrun Monster Party, and am the current world record holder. I'll be streaming my first play through, and likely speedruns, of the prototype version tonight, if anyone is interested. Should hopefully be streaming around 7-8PM Eastern. twitch.tv/drixiss

Awesome! I'm tuning in right now!

Hey dude, I feel pretty dumb...I left my microphone muted for the majority of the time.  I had basically no viewers, so I didn't really notice, haha.  I'll be streaming more of it today though, and probably be routing out a speedrun for the prototype version.  Might also do some runs of the real version of Monster Party.

Thats just him being a chode cause his $1000+ game he was going to die with isnt so hot anymore. Guarantee they are the same build or just a few months apart (but still probably 100% the same). The carts look exactly the same (same label, same off white colored cart shell) and were most likely sent to magazines for reviewing. They are both the final version before Shinsei would go in depth with bug fixing for a retail release that never happened. If famicomcafe had the earliest build, the one seen in Famitsu magazine with the "Sunset" background in level 1, it would be a different story- but its not because thats not the version famicomcafe owns. The numbers may just only be to differentiate between the prototypes that were sent off, kind of like a code number more than an alternate ROM

Probably just different header information which doesn't effect the game at all. The Ninja Gaiden 2 "Sample 32" prototypes have different headers despite them being the same prototype.