If you want the smaller of the two I would go with the 'Little Bunny'. Hameln is bigger, normally 2-3 ft. tall and 1-2 ft. wide. But I can understand what you mean about them looking like hair plugs...but won't they both look like that?

Thanks, Sarah. Once they grow into each other they won't look like hair plugs - as long as the blades overlap.

Seems like these would develop pretty fast.

'Little Bunny' does really well for us here in 7b NC...I don't think it will look like hairplugs, but if I were worried about getting it to fill in quickly, I'd just plant a little closer together.

If you are really freaking out, and color isn't an issue...I'd suggest taking a look at Festuca glauca 'Elijah Blue'. It stays 12" or less here...usually closer to 8". Nice mounding habit--works well in mass plantings...but I think 'Little Bunny' will do what you want it to.

Thanks for the reassurance, mjsee. I do love Elijah Blue and use it a lot, but it just wouldn't fit into this particular landscape. Plus it's a little 'stiff' - I definitely want the lovely movement that happens when wind hits ornamental grass. If I could have a favourite sound, that would be it.