A possible .....
Red,
An Aussie I met in the UK counts Spanish 21 by using a BJ single-level count but ignoring the twos, claiming results little different to BJ.
His reasoning was that as a two was a much more 'dangerous card' in Spanish 21 by not counting ( good job I proof-read this, I'd left the 'o' out of counting ! ) it as a possible bust card, it negated the effect of the ten removal.
He stated that the dealer bust rate was far lower in Spanish 21 and so was more inclined to hit 12-14 against a 2 or 3 depending upon count.
He used the basic strategy on the Wizards website as a start point.
He said there was less opportunity in the game, as it produced fewer strong counts but could spread better as the game was almost exclusively the preserve of gamblers in his home casino. Jumping bets didn't seem to get noticed.
There is no Spanish 21 where I am currently but had planned to look into these ideas further when I was going to come across the game again.
He seemed genuine enough and counted BJ perfectly.
He made sense.
The Doctor.