Few years ago, the same issue. IGO8 Vs PRIMO. Now, we forgot IGO8. Same will be with PRIMO.

IGO PRIMO is the KING for WinCe devices.
Igo Nextgen, not goes smoothly on WinCE devices. Dragging maps are terrible, even they downgrade maps details on maps review and overview. When I try to use "default.vis" from Primo, The NextGen poorly moving the screen with difficulties. I have a feeling , if we would load NextGen with SKIN, he would collapse.

What we expect from NAVI? I expect Speed, and quick reply on my command. NextGen does not have any.