Can't say I've had the latter. I'd guess Tanqueray 10 would work well as a mixer though as the flavour is pretty mild in comparison to 'standard' (bit harsh to call it that) Tanqueray and Bombay Sapphire. I like it in a G&T plus in a Martini (which it's designed for, apparently). Do you beatniks still consider a Martini to be a drink for squares? ;)