I've been looking for the Tamiya Centurion in 1/35 - but there seems to be 2 of them... the Centurion Mk. V (apparently released earlier) and the Mk. III. What's the difference?

not sure your looking at the same scale. Tamiyas centurion was a MK3 and is the same as kt as the Acadeny one. the other kit was 1/25 scale and might have been a Mk5. most evident changes are in the turret roof layout. loaders hatch is straightened and a ne pericscope is adde for the loader. there are automotive changes as well I beleive but thats for somone mor familiar with the Centurion.
Joshua

the orignel cent relesed by tamiya (mkv ) and the new cent ( mk III ) are one and the same kit, but the corect mark is stated this time and most importantly a price increse as well i.e. mk v £18.99 g.b.p. cent mk 111 £22.99 g.b.p. so you pays your money tou takes your chance