Use of SL vs XL tire

[bigvalpasha]

Hello everyone, I just purchased a LR3 2007 HSE with 50,000 miles on it. Tires need to be changed, but I happen to have 4 Eagle RSA 255/60R19 from an Acadia with 3/4 of thread left. THey have a slightly lower load rating (108 vs 111) and are SL vs XL.
I don't tow any trailer or do "rock climbing", only mud and gravel trails.
Any advice as to whether I can use them, specially since I know that these babes eat rubber like there is no tomorrow...

 

[bigvalpasha]

Just a heads up, I installed the RSAs and have had no issues so far besides the notice that the tire technician mentioned that he could no align the wheels since there was some juggling in the front right bearing...