You are the second person to mention Lanvin sneakers so i had to look it up. Yes similar plimsoles at similar price point (within 100 of each other). last/shape is different, and lanvin has many color options. You can probably even find them on sale for cheaper. Anyways many different shoe makers make plimsoles which are nice, so whatever floats your boat, just another option from JL.
Its funny bc i had never looked of any lanvin stuff as when i think of lanvin mens fashion i usually think of:
I have one Lanvin tie. It's not that bad. Hahaha
What I find really hard to justify is the price that JL charges over the sneaker. $600, 800 even, is a rip off.