V4 has slightly less crisp details than the V4b variant. Use of both may lend themselves to different stylistic results with the same commands or prompt URL entries as seeds.
v4 Notice the naturally slightly less sharp edges from V4a.
V4b Sharper and finer details.
imagine prompt: map of a gems zone :: geology :: gems paper style map :: markers, legends, icons, positions
imagine prompt: detailed mythological map. low-poly isometric ethereal zone. castles and roads and rivers, legend, icons, labeled.
