1)Indeed，A is superior to/enjoys a distinct advantage over B in，but it pales/proves inferior beside B/as compared with B in many aspects.A
2)In spite of the fact that A has made a great difference/contribution t o/has given life/color/variety/rein/birth/rise/a push to，it means/proves/ sounds nothing/trivial when compared with B in some respects.A
3)Although nothing/few things can come close to A/can outweigh A in，its demerits/disadvantages/drawbacks/defects stand out against B.A
4)Popular/Highly-praised/Welcome/Fashionable/Prevalent as A is in+地点名词/among some people，it suffers from/reveals/displays practical problems/faults/limits/weaknesses before/by comparison to/compared with B.A
is to students，it suffers from some undoubted faults by comparison to the face-to-face language learning.)
5)It is obvious/true that B cant compete/be compared with A in，but B still enjoys/secures/has/possesses distinct/considerable/decided/substantial advantages over A.A