Which is why I always said Commodore were crazy not to clock quadruple the 020 in the A1200 to offer an A1200+
28mhz 020 would be pretty much the same speed as an 030 @ 28mhz for polygon games and would have been cheaper than an 030.
040 is quite a bit better than the 030 as TPAM states so if you can get an 040 even @ 25mhz get that instead. Amiga demo's where a 25mhz 040 is recommended will not work as well on a 50mhz 030 from experience.
Not sure about Pentium M being a reworked Pentium Pro if you mean the original Pentium Pro which was a precursor for Pentium II destined for servers. Pentium M/Centrino is a clock doubled CPU, ie it executes one instruction on both the rise and fall of the clock pulse. Ingenious actually making a DDR type CPU, much superior to Atom despite being half a decade older.