the infusion system is still one to one. if you infuse something with a legendary mod into something without a mod, the gear with out a mod doesn't take on the mod from the gear you are infusing. if you have a chest armor at 295 with a legendary mod it is actually 290 and if you infuse that 295 into a 289 the 289 will only go up to 290, then you would have to put on a legendary mod on it to make it 295. so it is still technically one to one.