Help TAL-1 vs. TAL-120

Hello.
I would need your help on a choice.
I have to choose between two scopes:
TAL-1 110mm ~805mm focal
( http://www.astro.tomsk.ru/telescop/tal1.shtml )
and TAL-120 120mm ~805mm focal
( http://www.astro.tomsk.ru/telescop/tal120.shtml )

TAL-120 has a short tube and a Barlow lens in the focuser, in order to have a 'longer' focal length - but the mirror is 20% bigger in surface than TAL-1.
Can anyone can tell me which one has a better optical quality? Or there is no major difference?
Thank you