DxO OpticsPro 10 adds DxO ClearView, a spectacular new feature that eliminates haze, and improves its revolutionary PRIME denoising technology.
Press release attached.
ClearView, the headline feature for this version, is pretty impressive (although not as broadly useful as the PRIME noise reduction that came in v9).
Also worth noting that their pricing model has changed. Prices are lower than the previous versions, and the 'tiers' are different. Previously, they had two tiers with identical feature sets, but the more expensive version had support for full frame cameras. The pricing model with v10 is 'Essential' and 'Elite', both of which work with all cameras, and instead the Elite version offers additional features (see the attached press release for a comparison table). Since only the Elite version offers PRIME NR the 'essential' version is lacking a pretty essential feture, IMO. If considering purchase of just the Essential version, I'd recommend just getting the free download of v8 instead.
The other important point to note is this: "DxO OpticsPro 10 can now integrate DxO ViewPoint’s powerful geometrical corrections. After the DxO ViewPoint plugin is activated, a dedicated palette lets photographers directly correct perspective problems and volume deformation in RAW and JPEG images." That sounds like a good thing, but it's not. Most of those geometric correction tools were directly a part of v9 and previous. Granted, ViewPoint is more powerful and easier to use, but Optics Pro offered very good corrections for keystoning and volume anamorphosis and those are gone from v10 unless you also purchase ViewPoint. The need to now buy the ViewPoint plugin to gain back features removed from v10 mitigates the benefit of the lower price (v9 Elite was $300, v10 Elite is $200 plus $80 for ViewPoint...$20 cheaper is not a bad thing, but it's not the $100 cheaper that you might have thought you were getting until you went looking to correct keystoning or volume anamorphosis in v10!!).
Overall, PRIME is a bit better in terms of quality and a lot better in terms of speed compared to v9.