Another vote for 'completely different'. I think having the same word of 'love' for them both is probably confusing!
If anything were to happen to my DS I frankly don't know how or if I would cope with the devastation. I would probably do all manner of things to protect him that I wouldn't contemplate doing for anyone else in the world. I've become much more emotional and teary since having him because the idea of anyone mistreating little boys like him just finishes me off (Oliver Twist is out for now...)
Having said that, the interests and conversations of a one-year old are pretty limited and he requires constant 'maintenance' from me so, delightful as he is, I much prefer the company of my DH which is (usually!) far less exhausting and far more interesting to my adult brain.
My DH is also the one who takes my needs into account and tries to meet some of them so I'm definitely more grateful to him than to my DS, and I know that the love DH gives me is very different to the 'cupboard love' I (nonetheless happily) receive from my DS!
I used to think it was a bit of a cop-out to say that the love for your husband vs children is completely different, but it is!
I'm sorry your mother said that to you, though, OP. Is it possible she was just having a bad day and never imagined it would stick with you like this? I know I've held onto things said to me as a child that my mother has absolutely no recollection of saying and is astounded to hear ever came out of her mouth!