Cylindre piston AV7 Mobylette Motobécane

piston88I'm putting my 86 ATC 250R back together and have both an 86 and 88 cylinder. All things being equal, is one better than the other? I can see minor differences between them.Because K20 and K24 heads all share the same 50.5cc combustion chamber volume, the compression ratio will stay the same regardless of whether you these pistons in a K24 block