Hi-Low Count with I18 and F4 on H17

Hi everyone, I was wondering, using Hi-Low count, what are the differences in strategies for Illustrious 18 and Fab 4 when dealer hits on soft 17? I hope this isn't a frequently asked question, because I've searched everywhere I've could on the interwebs and on this site before asking. Using Wizard's Hi-Lo page:

https://wizardofodds.com/games/blackjack/card-counting/high-low/

I found after some searching that two differences for I18 are, for hit on soft 17:

1) Double on 11 vs. A on -1 instead of +1
2) Hit on 12 vs. 6 lower than -3 instead of -1

Are there any differences in Fab 4? I feel like surrendering 15 vs. A at +1 can't be correct anymore, the index must be lower than that.

Yes there's a change for surrender 15vA. There is also change for double 10vA. I don't know the indices for hi-lo anymore

Quote: Avincow

Yes there's a change for surrender 15vA. There is also change for double 10vA. I don't know the indices for hi-lo anymore

Thanks. I've heard about the change for double 10vA but because +4 for both 10v10 and 10vA is easier to remember I've heard enough people say that it doesn't matter enough to try to re-memorize the new indices.

Quote: ArtooDetoo

...I've heard enough people say that it doesn't matter enough to try to re-memorize the new indices.

My vote =).