I don't know the Carlevaro scales, but would suggest that you may find too many books of basically the same thing less useful, so long as the one thing you are working on is well worked out and gives a reasonably comprehensive set of fingers and techniques.
Re apoyando vs tirando for scales, yes of course practise them with both techniques, working on your weaknesses, playing with your strengths. You may find for instance that doing some of the more extreme combinations of RH fingers with apoyando is harder than tirando - if so, great, there's a reason for that and its something to work on; challenges are your friend.
Re both the Carlevaro and Segovia scales you may also consider that both are fairly ancient in pedagogical terms, and newer versions may offer better worked out ways of approaching things, perhaps especially in the matter of argeggios. I normally recommend the scales books by ABRSM.
Simon Ambridge Series 40 (2005)
Trevor Semple Series 88 (1992)
Louis Panormo (1838)
Alexander Batov Baroque Guitar (2013)