I primarily play cash games and have been trying out some MTTs recently. In cash games, it's normal to speak of winrate in BB/100. Is this measure also useful in MTTs? I normally hear people speak in terms of ROI, ITM etc. in MTTs.

I noticed that my BB/100 figure in MTTs is huge (much better than my cash game winrate). The MTTs I play are usually lower stakes and much softer. Is the cash game winrate in BB/100 comparable to MTT winrate in BB/100?