Trust me, alprazolam is way more addictive than lorazepam ( I'm prescribed 1mg xanax). I consider ativan to be very subtle, but I enjoy the relaxation with some weed. Keep in mind that weed potentiates the effects of benzos to an extent and can make them seem more euphoric than they really are.
Lorazepam is a potent benzo just like alprazolam is. They are both anxiolytics, but lorazepam has much more powerful anticonvulsant properties, more powerful muscle relaxant properties, and it's much more amnesic.
Alprazolam is not more "addictive", they are equally addictive and I'm being generous here. I can argue that lorazepam is more addictive and back my stuff up. But I don't want to go through that. They are very close in their capability to produce physical dependence, and like I said they are equally addictive - even though lorazepam has much more usefulness therapeutically.
The most physically addictive benzos are the ones that have high γ2 affinity which are: temazepam, brotizolam, triazolam, alprazolam, lorazepam, loprazolam, midazolam, flunitrazepam, clonazepam, lormetazepam, flutoprazepam, nitrazepam, nimetazepam, and estazolam
Both alprazolam and lorazepam are on that list. The hypnotics on that list are even more addictive.