Aelle (late 1970's) & Gara (introduced late 1980's) are plain gauge an equal in weight to Reynolds 501 SB (single butted), perhaps slightly better and slightly lighter as they were chrome manganese and drawn to a 0.8mm thickness throughout where as 501SB was chromium-molybdenum at 1mm/0.8mm. There was also a butted version of 501 (DB) and a butted Aelle, called Aelle-R. All of these were seemed tubesets iirc.
Columbus Cromor -- introduced in 1989 and the successor to Columbus 'Matrix -- is double butted CrMO and basically the same as aircraft grade double butted 4130 we see today on frame like the Planet X Kaffenback, Surly Pacer etc.
Columbus Brain was similar to Cromor - a CrMo but at a lighter gauge 0.8/0.5 (introduced about 1992/1993). They also produced an oversize version, mostly for stiffer road frames or MTB use. To add further confusion, there was also an oversized Cromor tubeset (OS) in the 90's. It had a green outline sticker instead of blue.
Columbus MAX (1987) was the first tube-set to break tradition of conventional diameters (25.4 mm for the top tube and 28.6mm for the down tube) with its 31.7 mm (top tube) and 35 mm (down tube). Max was a revolution in the frame construction system, allowing very tall or very heavy men (180lbs+) to have a light but extremely strong frame and introduced the concept of oriented ellipses and differentiated sections, applied to each of the 11 tubes, to give the frame greater rigidity.
Columbus Thron is also a 90's tubeset made of CrMo and similar to Cromor but drawn down to a thickness of 0.6mm in the middle of the tube (0.9mm at the ends). They also had an Oversize version. I had a Swiss made Allegro roadie made of Thron OS and it rode very nice indeed. I regret selling it to a fellow retro biker for little money.
much appreciated 
