I did some looking up, and apparently the definition by which Obama’s “removal of illegals” is reported is based on court orders for removal, not who actually left, so it’s unknown.
The Trump administration is: 1) Targeting criminals, and 2) Hindered as much as possible by judges, sanctuary cities and states and criminal lefties tipping off and helping illegals to avoid ICE. Obama got a pass from all of those groups. It needs more research, because it’s so implausible that Obama’s removal of illegals was robust at all, and as my old dad used to say (regarding the numbers reported) “Figures don’t lie, but liars figure”.