I haven't seen the 6RMAS ones IRL to compare but it's possible that the grey dial one is more of a direct imitation of the glossier 62MAS dial. The SLA017 dial is not matte.
(Edit: put the 017 on today and it actually does have a matte finish to the sunburst. Just much less noticeable due to the effect of the domed glass and polished rehaut.)
They’re awesome, the 62MAS is my favourite divers watch design, but I don’t really go for vintage (hence the SLA017). All the 62MASs I’ve seen have quite grotty dials too. They don’t seem to age well.
I haven't seen the 6RMAS ones IRL to compare but it's possible that the grey dial one is more of a direct imitation of the glossier 62MAS dial. The SLA017 dial is not matte.
(Edit: put the 017 on today and it actually does have a matte finish to the sunburst. Just much less noticeable due to the effect of the domed glass and polished rehaut.)