The first one, from circa 1983, is a straight port of the 1982 ColecoVision cartridge port (save for title and option screens).
The second one, from 1985, is another straight port, in this case it's adapted from the Sega SG1000 cartridge version.
I can understand why this occurred, though, since all three platforms (MSX, ColecoVision and SG1000) share the same Texas Instruments (TI) TMS9928A VDP and the Z80 CPU, as well as the TI SN76489 sound chip. But to some of you, it may seem redundant to own either MSX port if you already have the ColecoVision or the Sega SG1000 or SC3000.
Edited by ColecoFan1981, Wed Feb 13, 2013 5:08 PM.