The compact front-mount — the deck out front where you can see every pass.

With the deck mounted out front instead of underneath, you can see the entire cutting path as you mow, which makes trimming close to beds, trees and buildings more precise. Front-mount decks can also be swapped for other attachments, since the machine is really a compact multi-purpose platform.
Front-mount mowers are built as multi-attachment platforms, and a diesel engine suits that year-round, higher-duty use better than a gas engine sized purely for mowing. The GF's 16.6 HP diesel is matched to its compact frame and deck range.
Both are available. 4WD is worth the upgrade if your property has any slopes, wet ground, or uneven terrain where front-mount traction matters most.
Front-mount mowers generally handle slopes and uneven ground well because of how their weight is distributed, and the operator has a clear view of the terrain ahead. 4WD models like the GF add further traction for hillier properties.
Tell me about your property and the work you need done — I'll point you to the right machine, even if it isn't this one.
Tell me what you're working with