blackjack basic strategy chart no surrender

I'm sort of inclined to go with Norm/Colin here just from a psychological point of view (i.e. Norm and Colin, however, say just to stand here.

In basic blackjack and wizard of odds, they say to surrender hard 17 vs Ace.

However, Colin says don't surrender with hard 15 vs dealer's ace, only surrender with hard 15 vs dealer's 10.

In basic blackjack, wong says to surrender on hard 15 vs a dealer's 10 or a dealer's ace, wizard of odds also says the same thing.

I'm inclined to go with Wong and wizard here, but Colin's way is easier to memorize. Wizard of odds agrees with Wong and says to hit, not double down. u/colinbradleyjones however, on his basic blackjack charts, which is based off on H17, says to double down here.

In basic blackjack, the boi Wong says to hit this.

I've seen a few variations in basic strategy in several books and online resources (things like Basic Blackjack by Stanford Wong, Modern Blackjack by Norm Wattenberger, Wizard of Odds, Blackjack Apprenticeship) and I'm wondering what is the 'correct' basic strategy for H17, DAS, with late surrender.

the past month or two and I want to make sure I have basic strategy down like it's second nature before even attempting indices (indexes?). Okay so I've been reading up a bunch on card counting, etc.

Blackjack basic strategy chart no surrender