Thanks for responding Paul. Unfortunately the matching values are from someone else's post.
I think the issue is that my tester runs off a 4v rechargeable battery, and it does not specify the test conditions. Leakage is off by as much as 50% quite frequently, but the hFE is usually very close.
RG Keen method
First reading = 1.3v
Second reading = 2v
1.3 / 2.472 = 0.526mA leakage
(2 - 1.3) * 100 = hFE 70
Multi-function tester
hFE = 73
Ube = 109mV
Ic = 1.2mA
Iceo = 0.45m
Ices = 31uA
I guess the thing to remember would be that in instances where we want to use Germanium transistors, we need either high or low leakage devices. The draw of a tester like this is the “plug and chug” functionality for roughly sort transistors for specific purposes.
For instance, if I want to make a Tone Bender MkII, I wouldn’t be all that interested in EXACT gains and leakages but rather the ability to roughly sort 10-12 transistors very quickly with no extra math. All I need to know is approximate gain and that they leak considerably, not exact values.
Conversely, if I want to build a FF or Rangemaster, and I was fairly confident in the hFE values I was getting, I’d be content with rough sorting for the lowest leakages you could find, again without any extra math or fiddling.
I think you’ve talked (or I’ve talked) me into buying one of these!
Definitely - agree with you on this re quick sorting. 
You can easily tell if it doesn't leak much, or if it leaks a lot. What's bothering me is that I need to understand why there's differences in measurements between the two methods, and I don't know this at present.
It's a very handy little unit, great for dropping random transistors / JETS etc in to find out more about them in a matter of seconds. Despite the annoyance re differing leakage measurements, for the price it's pretty cool.
Inspired by this thread, I picked up a TC1 tester. It came yesterday and i had a prime candidate for measurement in a leftover Q1 from a Small Bear Tonebender MKII set.
Steve measure 63 hFE and 21 microamps of leakage using the "Bare Bones" method. the TC1 measures it at 63 hFE and 14 microamps of leakage. Not bad!
As to why the difference, i'm not 100% sure. There is of course the question of differing voltages. I know that Steve measures at ~ 9vDC, as well as R.G. test rig. My TC1 is around 4.15 vdc on a full charge. There is also the question of internal resistances for TC1 playing a role in the measurements.
Lastly, we have to factor in environmental conditions. I know that Steve from Small Bear advocates letting the reading stabilize in his measurement documentation for the "Bare Bones" method, but you never know how much he had to contact a transistor when testing a number of devices in a row. I for one saw a decrease down to 8 microamps leakage from 14 after letting my device "settle" in the TC1 for a few minutes.
Keep in mind that the margin of error for lower leakage transistors will be higher just due to the low leakage anyway, i.e. the difference between 21 and 14 microamps in my case (33%) is MUCH greater than the one you saw for 526 and 450 microamps (15%). At the end of the day, mostly anything under 100 microamps is good enough for me as "low" leakage and if I need anything "high" leakage, knowing that it is "high" from a ballpark value is really all I need.
The moral: This TC1 unit seems to hit gains on the head and there is really no value in knowing EXACT leakage, so this thing is a godsend.
