They are different enough to count as two different songs: same basic theme and same tune, but completely different words and emphasis.

Threshing Machine (RUGBY VERSION)

I worked for a farmer, you know him quite well,
And he had a daughter, her name were Sweet Nell
And though she were only the age of 16
I showed her the works of my thrashing machine

I 'ad 'er, I 'ad 'er, I 'ad 'er away
I 'ad 'er, I 'ad 'er, I 'ad 'er away
I 'ad 'er, I 'ad 'er, I 'ad 'er away
And I led that virginal creature astray.

We went to a barn where it was quite dry
Some hay in the corner we there did espy
She worked the throttle and I worked the steam
When I showed her the works of my thrashing machine

Six months have passed and all is not well
There's something the matter with our little Nell
For under her apron can plainly be seen
The works of my naughty old thrashing machine

A year has gone by and all is now well
A son has been born to our little Nell
And under his nappy can plainly be seen
A brand-new 2-cylinder thrashing machine

My Threshing Machine (ADGE CUTLER)

Now I farmed in Carlsbury when I were a boy
A courting of Rose, she were my pride and joy
Now Rosie was pretty and just 17
When I showed her the works of my threshing machine
Threshing machine, threshing machine,
I showed her the works of my threshing machine

She told me that she were a much-travelled girl
Seen faces, been places all over the world
But there was one sight that her eyes never seen
A vertical piston-drive threshing machine
Threshing machine, threshing machine,
A vertical piston-drive threshing machine

We went to the barn and I took her inside
And said "If you're good I might give 'ee a ride"
It stood there all sparkling and shiny and clean
She said "That's what I call a threshing machine"
Threshing machine, threshing machine,
"That's what I call a threshing machine"

She asked me to demonstrate how the thing worked
So I let out the clutch: the machine went berserk
You couldn't see nought for the smoke and the steam
When I started revving my threshing machine
Threshing machine, threshing machine,
When I started revving my threshing machine

When I said Rose could drive it, for better or worse,
The whole damned contraption went into reverse
The camshaft seized up - well, you know what I mean
And that was the end of my threshing machine
Threshing machine, threshing machine,
Now that was the end of my threshing machine