jakepeewee wroteTaste is of course a very personal thing but I like the looks of the SP3 better than the SP4. To me the SP3 is rougher around the edges, more pure at heart so to say. SP4/SPS is a close second though.
To me the SP2 is lacking in looks relative to the SP3 because of the low exhaust and some other small stuff. Also like the SP5, but those forks...
Jacco
You are quite correct Jacco, the SP3 has the beefed up newer crank cases and looks like the homologation bike it surely is, it has the correct deep side panels and rounded tank as the period race bike, the later SP4 b& SP5 were boutique bikes by comparison likely sold with marketing in mind rather than necessities to permit the race bikes to compete. I wish I could own an Sp3!!