Three very different basses, in a lot of ways
... the Mustang is obviously a short scale, which makes it much different than the other two, also a 7.25" high gloss neck, which further suits it for the smaller hand or guitar player who wants a similar size/feel ..
.. the Hwy's, realize there are two different models of the Jazz here, the pre 2006 Highway 1, with the headstock adjust truss rod, vintage threaded saddle bridge, etc ... and then the 2006-current Highway ONE, which sports the heel adjust truss rod neck, very similar to the Special and current AM Standard with the graphite support rods .. this neck utilizes a 9.5" fretboard radius, with MEDIUM JUMBO frets, and the BadAss II bridge ... more of a satin finish on back of neck .. I have had a few of these, both pre and post upgrade (2006)
... the Classic Series 60's Jazz, is also a 7.25 radius board, this time with the thinner VINTAGE frets, reverse long stem vintage tuners and the vintage threaded saddle bridge
and a very nice gloss finish, with a little more substantial neck than some of the very thin Jazz necks ... the fit and finish on these is very nice ... I have had 3, and currently still have one (it may be for sale) ... I have found that the older the better for these, as they were introduced in 2001, and that was also the year that Fender offered a FSR (special release) on these in a couple of colors with painted headstocks to match ... VERY nice instruments, and fairly rare ... the Classic 60's I have had were '04, an '06, and the current '01 ... neither the '04 or '06 compared to my '01, in sound, feel, or finish ... also, both the Hwy's and this Classic 60's are two of the very few bodies that Fender offers in a Jazz bass, without 'channel routing' from pups to control panel ... although the newer Classic 60's DO have a CNC hole under the pickguard ... none of mine did/do ... just in case you want to go without pickguard ...
Edit to add: I did not mention that although I have owned several of the other two basses you are inquiring about, I have not owned a Mustang, but have had one in my hands, and played unplugged recently ... my big issue at this point is with the 7.25" radius boards (which is why I am considering selling my Classic 60's), is with my worsening arthritis ... it seems that the flatter 9.50" board is less painful to play at this point, so I have been going there ... the short board of the Mustang, with my very wide hands, and the 7.25" radius made it almost unplayable for me ... but, the fit and finish of the bass was superb, and I really liked the nice light weight ... but as mentioned, I never got to hear it plugged in ... feel free to PM me if you have questions on either of the other two, I have had several ...