I cannot say whether or not the tenders on the 13 Krupp-built Mikados were any different than the Baldwins or the 3 Porters, but all Mikes from 150-206 were mechanically alike with `18" by 22" cylinders, 40" drivers.
150-153 were the first 4, built in the 30's
154-156 were a trio of Porters, the 154 being the last to see service. All of these ended up on the Pacific Division
157-161 were Baldwins, all with dome throttles.
162-168 were Krupps with dome throttles
169-174 were Krupps with front-end throttles. 169 was the oddball having her throttle linkage hung on the fireman's side of the boiler!
175-206 were all postwar Baldwins with front-end throttles & 180 lb. boilers as opposed to their predecessors 175 lbs. These were built 1946-1948.
You asked about operations out of Guatemala City. Before the arrival of the 18 Spanish-built G.E.'s in late '71, there were at least 3 switch jobs assigned, one at Gerona yard & the other two right in Guatemala City. There was a light helper that would run to Rancho & help the daily passenger back up the 3 summits to Guatemala City. The daily passenger to Barrios frequently got 2 Mikes, and there was the tri-weekly local to Zacapa that ran with steam. Extras were steam-powered.
The line to the border was usually handled by Mikados, but if they were power-short, Consolidations were used.
The Mikes were a nice design...back when I rode them in the 70's the roadbed was still kept up well & I had several trips were we ran at 30-35 mph. I remember that the Baldwins rode a little easier, but the Krupps held the rail maybe a little better. The one Porter that I ran was pretty well worn out by that time.
