[bluebarbet]

The performance advantage is small to nil, IME. The UI is admittedly cleaner, though partly (as you say) that's simply because it has a ton less features.

[xigoi]

Interesting. When I switched from OsmAnd to Organic, the map loaded much faster as I panned it.

[orbital-decay]

The difference mostly comes from the default detail levels and shape optimization. You can make it as fast in OsmAnd as both are GPU-accelerated, but OsmAnd renders the map more detailed by default.