The main difference between Eisbaer and Eisbaer LT is the missing reservoir and the LT version has 25 mm thick radiators, the normal Eisbaer has 30 mm radiators. But the 360 mm LT version is strong enough for all CPUs on the market and the reservoir is mainly interesting if you like to built a bigger loop with for example a GPU cooler or a further radiator. Without the reservoir it is not easy to fill the loop again.
But if that isn`t an issue for you, you can choose the LT version without any problems. ?