thanks for all suggestions guys. i guess i'll have to do a lottery regarding what next cd should i check out 
i finally received Nigel Kennedy's (NK) CD a week ago, i'm not sure if it's his first or second recording. the first thing that i noticed was that NK's recording is more transparent, i could hear more subtle details and deeper into recording, violins sounded more as individuals with air between instruments as opposed to as 'a whole' sounding violins in Cho-Liang Lin's (CL) recording. it could be an effect of more violins in orchestra of latter recording. CL's CD also had slightly softer attack of leading notes and felt more closed in. nothing tragic though, both CDs sound very good, just NK's sounds exceptionally good. also NK's recording seems to be less dynamically compressed.
performance wise, NK sounds more refined and delicate, i particularly enjoyed slower tracks and passages (tracks 2,4,5,8,11), where musicians are playing with tones. overall i would say NK's interpretation of Four Seasons is very playful. talking of playful, track 9 is a marvel of NK's recording and easily my favorite track of that cd. CL sounds more raw and straight to the point, which has its charm too but i preferred the NK in slower tracks. however, advantage of violins number in CL's orchestra can sometimes turns into musically more inspiring composition in the faster and dynamic tracks. for example, higher tempi and pitch in the beginning of track 7 sounds very underwhelming compared to CL.
initially, i was going to say i would pick CL over NK, but in a week NK grew on me so much to change my decision. mainly because of superior sonics and playful interpretation. on the other hand, CL contains 6 bonus tracks that i really really like, so both CDs are definitely a keepers.