Nearly all Earth training was performed in the A6L model spacesuit (seen in the pictures above). Actual missions flew with the A7L model suit. Differences include:
The outer (EVA) layer of the A6L had separate torso and pants, with entry at the waist. The EVA layer of the A7L was one piece, with entry at the back.
Some astronauts were never expected to leave the vehicle (Apollo 7 and 8, and the CMP through 14). To save weight, they were given an A7L without the extravehicular parts. But all A6Ls were the same.
The A7L had a visor assembly with a protective transparent visor, a gold sun visor, and side shades. These did not exist on the A6L, and you can see them missing in the pictures above.
The arm joints were modified between the A6L and the A7L.
The layers of the outer garment were modified to protect against tearing.
EVA versions of the A7L had a second set of hose ports for the Buddy Life Support System, so astronauts could share their air supply if one failed. The A6L and the pictures in the article have only one set of hose ports.
The A7L was modified for Apollo 15-17 to bend at the waist, so they could sit in the lunar rover. The CMP for these missions was given a proper EVA suit to retrieve experiments from the service module.
During training, the astronauts wore a cryogenic pack on their back, instead of the Portable Life Support System:
The cryogenic pack (fig. 51) is a liquid-air ventilator housed in the same envelope as the PLSS and worn on the back for mission simulations. The cryogenic pack pressurizes the suit to 17 to 25.5 kN/m$^2$ (2.5 to 3.7 psi) and operates for 90 minutes on a full charge. The suit interfaces are the same as for an actual PLSS except that the cryogenic pack does not have the water and communication connections. The charged weight, with mockups of the OPS and controls, is approximately 31.75 kilograms (70 pounds).
So they were cooled by the evaporated liquid air. I'm not sure they even wore the liquid cooling garment, as they carried no cooling water. Also, the pictures above show only one hose; a second hose would be needed to return exhaust air back to the PLSS.
There were also suitcase-like units for ventilation. The Portable Oxygen Ventilator was used with the helmet, and the Open Loop Ventilator was used without the helmet. Either could be used to cool the astronaut between training sessions.
Source: Apollo Experience Report: Development of the Extravehicular Mobility Unit. NASA Tech Note D-8093. PDF, 9 MB
(I'm one point short of 10k reputation. Hope this puts me over the top!)
Update: @OrganicMarble posted a discussion board link that quotes Dave Scott and Jim Irwin:
IRWIN: The work on the lunar surface was not much different from what we experienced on the rock pile. We didn't sweat as much, but it seemed like the work was about the same.
SCOTT: If we could get LCGs in the training suits, and the training backpacks, we'd have an excellent simulation of the lunar surface, in spite of the fact that you'd have the heavy backpacks. That was excellent training. I agree with Jim. The surface operations were not too much different from what we'd experienced on the rock pile. You gain an awful lot by going out there and working on the rock pile back of the simulator building.
The addition of the geology stops there at the Cape is good. We didn't have the opportunity to exercise all those rocks they'd put out there for us, but I think the following crews will find it very useful to drive the Rover and go through the procedures of getting off the Rover and doing the geology, the sequence of events with the high gain antenna, the LCRU, and everything. It was very good training.
Some the pictures there show training in the later A7Ls that could be worn on the rover.
Apparently due to budget reasons, some of the later training had to use suits that were already used on the moon. Sad.