whats better 6a or 6al

Yay there I'am new here and I have a mallory hyfire cd igntion that has all the features of the digital for only $240 adjustrev limiters, and window swtichs, it has a nitrous retard that I use with the nitrous I have it setup to pull 6 degrees out when the nitrous system is actually adding power. You can do all this with a touch of a button. With no chips or dials. I think it is a really good box and I think it is better than the digital 6. or and 6a or 6al

Just a recomendation

Thanks