I don't have either of those interfaces, but before you go out a buy something else, I want to mention something that happened to me for you to possibly look for:
After updating the driver on 1 of my interfaces, it set the latency to a ridiculous '4096'.
So I'd check all settings again for changes that might have occurred without you knowing it, as I now do automatically since that happened.
Otherwise, Presonus stuff is all really quite good these days.
-C7.0.7/C7.5 -Win 7-x64 -Intel i7-2600k -ASUS P8Z68 V-Pro -Antec High Current 520w -16 Gigs RAM
-Hyper 212+ CPU Cooler -3 SSDs -WD 1TB Black Caviar Hard Drive -WD 1TB External USB 3 Drive
-TC Electronic SK 48 & Presonus StudioLive 16.4.2 Audio Interfaces -Roland UM-550 MIDI Interface
-Neumann TLM 103 Mic -DBX 376 Tube Channel Strip Pre Amp/Comp -ART DPS II Tube Pre Amp