Lamm ML1.1 & ML 2.1

Hi,

I've the opportunity to heard 2 times the ML2.1 - 18 watts class A - first time on JM Lab Grande Utopia BE and the other one, on Kharma CRM 3.2

I love the sound of the ML2.1 : so natural, so human...

But I don't know the lower priced ML1.1 - the 90 watts -I'm living in France and it's not well distributed.

What differs between both in terms of sound ?

Do you know other amp with this kind of natural sound - at same price or lower !!!!

Thanks

David