The Juno DS is certainly a lower-tier synth compared to the MODX and FA-07, although it‘s a good value for the money.
Surprisingly, some of the Juno DS sounds are even newer and better than the equivalents in the FA-07 due to Roland‘s strange decisions. The FA has a selection of SuperNatural Acoustic sounds, but a lot are missing. For brass, sax etc. you are left with the very old PCM section taken from the XV 5080, or you have to use one of the two expansion slots for the studio expansion, but the two slots won‘t cover everything you might need. The Juno DS has a wide selection of newer samples in all areas of acoustic sounds. As I said, one of Roland‘s obscure product desicions...