The new ones will almost certainly have better stereo imaging, soundstage and pick out details with finer granularity, that's the advances in driver and tweeter engineering with newer generations. The cabinet size typically dictates the bass, although a long throw driver can get great bass in a smaller cabinet, still not as rich as a big cabinet but good enough to enjoy for sure.
Only aptx LL supports low latency, aptx covers a wide range of CODECs all for specific uses. Be wary of this because LL must be supported by both ends and if on Windows then Windows absolutely will not use the best Bluetooth CODEC, you can only do this manually by installing a third party Bluetooth replacement for Windows (Alternative A2DP driver) where you can pick the highest quality bluetooth mode Windows uses for audio on a specific connected output device. Microsoft never cared about Bluetooth audio so even hi res headphones etc connecting to Windows will just use a baseline CODEC.
You can bypass windows stack by using ASIO but it's pointless unless all of your music is in lossless format which I am 99% sure is not. It also means exclusive mode needs to be used so whilst that ASIO playback is going on, nothing else can use that output. You can sidestep it by enabling WASAPI instead which is shared and works fine but you need an audio player that supports WASAPI like MusicBee, Foobar etc. Bypassing is not necessary in modern times. Windows 11 does a fine enough job with its updated audio stack vs previous versions.