Video Poker multiplay vs single play

Which of these options would produce the highest RTP over the long run? Play a single hand 9/6 game @ 5 coins per hand or a 5 play 9/5 game @5 coins per hand ? I suspect that the single play has a higher RTP, but Is there any scenario where playing less than 5 coins or the number of hands played on the multiplayer changes the final RTP comparison?

I assume playing less than 5 coins on a multi-play machine will reduce Royals from 800 for 1 to 125 for 1, the same way it does on a single-play.
By "5 coins per hand" on the 5-play machine, I assume you are paying 25 coins per 5-hand play.

The only difference between a single-play and a multi-play is, it just so happens that the next (3, 5, 10, 50, 100) hands you play all have the same five cards dealt. This does not change the individual hands' RTPs. It might change the variance, but my statistics skills are not up to the ability where I could calculate it.

Single-pay 9/6 will have a better RTP.

Instead of being $3K down on 5 quarter single play VP after 25K hands; I could be down $15K with 5 hands, or $30K with 10 hands, or $150K with 50 hands, or down $300K with 100 hands. How many Royals do I need to make up the difference? 3, 15, 30, 150, or 300!