I prefere Mikael and RTC. Mikael and Swano are my favorite death metal vocalists period and while being low(have lower register when singing also) are very articulate where you can understand them and also have great phrasing and fit perfect with sections of songs and are not monotonous, and also are very distinct having their own identity. I like vocalists who sound different than others and can tell on a dime it's them and are impossible to confuse with other vocalists. Peter is a great vocalist also having his own style/sound and do not compare him with Mikael because both are just very different and the material they layed vocals on in Bloodbath is also slightly different.