Here is alignment of Aruba Instant On with Ubiquiti APs, researched to the best of my abilities.
Competitive Model | AIO Best Offer | Notes |
Ubiquiti Lite (UAP-AC-Lite) | AIO AP11 | Both 2x2:2. AP11 is Wave 2. |
Ubiquiti AC In Wall (UAP-AC-IW) | AIO AP11D | Both 2x2:2. AP11D is Wave 2 and comes with desk stand and in-wall mount |
Ubiquiti LR (UAP-AC-LR) | AIO AP12 | LR is 2x2:2 on 5GHz and 3x3:3 on 2.4GHz. AP12 is 3x3:3 both bands, so better performance on 5GHz which is where you want it. |
Ubiquiti Pro (UAP-AC-PRO) | AIO AP12 | Both 3x3:3. AP12 is Wave 2 |
Ubiquiti NanoHD (UAP-NANO-HD) | AIO AP15 | Both 4x4:4 Wave 2 |
Ubiquiti M (UAP-AC-M) Ubiquiti M-Pro (UAP-AC-M-Pro) | AIO AP17 (outdoor) | All AIO models (including those above) support Smart Mesh, allowing extending connections wirelessly to another AP. AP17 models are all weather outdoor APs. |