UR44 vs UR28M converters and sound?

Hello,

Are the converters of UR28M and UR44 the same?

I read many posts about this and as far as I see; UR44 has very similar converters and sound with MR816, but MR816 definitely has better converters and sound than UR28M. So I think UR44 is better than UR28M?

I’ll buy UR44 or UR28M?