To me, I'd say yes.
The ORIGINS are different, but if you look at their outline (Where RF to IF to AF) - that layout - they all share a same "root" base.
Much like how Galaxy is to RCI and RCI's are to Galaxy but their ORIGINS to be merged are different. RCI arrived from Clear Channel's knowledge base foundation, but Galaxy arrived from Tax Evasion - at least the principle of it...
Cybernet inclusive
ROOT: Referring to the layout and basic building - use a simple Quad Op-amp to handle AGC, S/RF meter and Squelch - RF amp still uses Broadband Quadrature (as I call it) input coil to Receive. Simpler Band Pass Filtering if any can be applied but their boards for each platform just were populated with the more support needed to operate those extra modes and features. Dare I say it? Even 40 channel operation with BCD layered out in channels and bands - Ok I said it...
Midland and Uniden took a different look at their designs and made boards specific for their platforms AM versus SSB / FM - not their modes - when it came to more modes, the complexity was addressed by their boards, created, that is populated for the purpose - it's dedicated for that reason. Take the 138/139 and 66/76 (their derivatives) but then look at the 142 versus the 148/2000 and Washington versus Madison - pretty much made a board to populate for that purpose (Features) you didn't get a board riddled with empty holes - at least not like Galaxy's approach, Stryker and RF Limited does.
Only now is Uniden taking such an approach but that is a story for later - I'm done segue-ing off topic...
Now, I've worked on Magnum, Galaxy RCI and even owned them, but Stryker, due to their Class of part building - they were more like Cadillac is to Lincolns as Lincolns are to Cadillac. A little out of my price range - worked/Repaired yes, they are not as "dream boat" as many think. They are quite complex and in some instances - Brute Force methods are used - at least when it comes of the urban myth of the 2SC2999 use - they(being Stryker) based their reputation around it as a viable means to receive.
But as you look thru the various boards - they have a common ancestor (see above) but their build quality is different - at least the people that put the things together are of a different caliber than say Uniden to Dynascan which they seem to drift from one country to another in search of the cheaper labor that seems to be the main drive of many companies except perhaps Stryker.