From the standpoint of the same Hard DIsks, Graphics Capabilities, and networking, all of my machines overlap. They're all vintage x86 PC's running quasi-modern hard drives with DDO, as fast/powerful a graphics card I can jam in there, and TCP/IP using IPv4 over a modern network using DHCP complete with internet and (limited) LAN Access.
The only real differences are RAM, CPU, what Floppy Drives (if any) are installed, and what Operating System the darn thing runs.
My GEM 286 and Tandy 1000A overlap by virtue of the GEM's turbo button. It actually does a pretty good approximation via the turbo button of an actual IBM XT clone. Honestly, I could totally forego the Tandy if I put a Tandy 3-VOice card in the GEM, and drop it down to EGA from SVGA 1MB.
I have two Pentiums, one laptop, one desktop. Both with 80GB Drives, Maxxed out hard disks, 1MB Accelerated video, and BOTH are NEC computers (Versa P/75 and Ready 9522 LPX Tower) - one runs 95 (Versa), one runs 98 SE (Ready) - the only real difference is the Ready has 128MB of RAM, and the Versa will have 40MB as of this afternoon, and the Versa has WiFi. The Versa is a Pentium 75, and the Ready is a Pentium 100, but the performance is so close even with both running 95 it's almost like THAT's what I should LAN game with for Win9x.
I have THREE 486 - the 486 DX4-100 desktop, and 2 NEC Versa laptops (40EC, M/75). The slowest is the 40EC and even that runs 95 comfortably. However I'm running FreeDOS or MS-DOS 6.22/Windows For Workgroups on them most of the time these days. If HX gets any further along to run Win 9x Games from DOS well enough they'll overlap the Pentiums as well - which they already do under Win9x.
The DX4-100 Desktop already overlaps and even exceeds both PEntiums. The DX4-100 has a 2MB S3 805 VLB card, and that thing beats the pants the alliance integrated video on the Ready and I have yet to try it against the 1MB C&T video on the Versas but if my M/75 is any indication, they are evenly matched. The benchmarks PC Magazine ran on the Versas in 1993, 1994, and 1995 for the 40EC, M/75, and P/75 respectively had them come out on top in the graphics department. I think the C&T is way better than the Alliance so in a way my 486s have better video than my Pentium desktop does (which only has one or two PCI slots, so I'm really hesitant to start cramming in a big powerful 3D Card, esp since there's not much 3D stuff I run that's not modern anyway).
The one nice thing I CAN do with all this very similar Pentium/486 hardware is LAN game, and since three of the five can run without Ethernet Cables on my LAN, I can indeed LAN game - ie DOOM or Wolf3D or even Quake - with up to 5 people. I did this with my Wife on the Ready 9522 and me on the DX4 desktop last year and the graphics quality was really visible with those two side by side, the Ready kept dropping frames, my DX4 was full frame rate the whole time.
There may come a day I downsize....if I had to go down to two, the GEM 286 and Versa M/75 would stay at this point. The GEM for XT class stuff, and the M/75 for the later stuff with 2 different drives. If 5, the GEM, plus the three Versas and my 486 Desktop. But with my wife getting into this I might end up getting more machines....heck, she still likes to talk about the Compaq Portable her dad had back in the 90's (apparently he had one of the early ones, or a clone thereof).