I dont think there is a better or worse, it completely depends on the situation. If you can only play a few tables then lagg will be more profitable, it you want to massively multitable, tag is better for that. The higher in stakes you go the more lags you see, and these arent just the lags that like to bet, they are the lags that know what they are doing. So again, to find out which is the most profitable it all depends what and where you play, and more importantly, you yourself. In the end though there is not 'best", there is only what works for you.