Why the focus on the oil cooler? Excessive oil temps? Planning track days?
Judging from the pics, it may be smaller than the OE oil cooler. The production dimensions appear to be for the box it comes in.
I'd be concerned about flow. Pressure drop. BTU heat rejection rates (if anyone even publishes that info) for X-chassis size. Personally, wouldn't go with any other than Setrab. Have one on my other car- 25yrs no issues so far. It's huge and use a t-stat control to prevent over-cooling. Which our cars I believe already have.
Better oil will also help reduce oil temps. Noticed 10F drop or so in my other cars.