1972 340 TRW piston question

on my 1970 34- idumped the old heavy TRW pistons for a set of Mahle pistons
they are lighter and make no noise put 1200 hard mile on them and that engine never burnt oil between changes and was quiet , no piston noise at all . I have another 1970 340 i'm building this winter , the old TRW pistons are going on a shelf and a new set of Mahle are going in . would not waste my money on the speed pro pistons