i've had the low vegan docs for 4 years now. they hold up well. the 'leather' looks pretty good/ real, if that's important 2 you.
the creasing and wear on the shoes isn't as 'beautiful' (subjectively defined) as on my very old MIE leather docs. not sure what the leather on the newer docs is like. it could be just as 'un-beautiful' as the vegan 'leather'. i also find that the vegan docs are more sweat-retentive, but that could just be me.
it's worth thinking about why you're buying them. if you're buying the vegan docs for ethical reasons it's (arguably) better to buy second hand docs than buying brand new vegan ones and thereby creating increased demand for shoes that (probably) use environmentally aggressive production processes to create the plastic for the shoes, which will start breaking down in 10^100 years, as well as rewarding doc martens for (probably) exploiting chinese labourers. i.e. if you are buying them as a 'ethical' decision, buying second hand docs from your local second hand store/ ebay seller (whether leather or vegan) is probably 'better'.
i have no idea what 'felix rub off' is.