Victo, I forgot to mention. Both companies will probably give some estimate of the hours you will fly, however use common sense to see the "reality". Meaning, ask where are they flying/or will fly, private owner or charter (in case of G150), ask some pilots that are already in the company how much they fly (if you can)... Stuff like that.
I spent almost 3 years in business aviation and my minimum was 250 hours/year and maximum 400 hours/year in the same company. But at the time of joining this company I was told higher numbers...