Some are obviously far clearer than others, given the timescale between the two being filmed and the different locations used in both.  But what trivial changes have you spotted between pilot and episode one?

For example, the conference room sign in the police station is different and has moved on the door into the room!

It becomes (and largely stays) sunny...

The dismantling of the vestibule in the Sheriff's office is interesting.  In the pilot, the reception window in Lucy's office opens out into a windowed room or breezeway that separates her from the waiting area.  This is gone in the series.  In episode one, there is a very brief shot (as Cooper walks in) of a man with a tool belt and another with a ladder and an acetylene torch "disassembling" this feature from the building.  It's always seemed strange to me that they thought to "explain" the absence of this vesitbule in such a low-key way.  It's really easy to miss (kinda like the existence of the room in the first place).

The vestibule in the pilot.

The vestibule dismantled in ep1.

"What credit card do you want to put that on?"
"Caash, prease."

 You mean no camera lens filters or....coffee filters? Surely filters in the series would have prevented the fish getting into the percolator.

Does the Packard house change? I can't remember a view/set-up quite like the one when Pete says "Gone fishing" at the opening of the pilot. Was the pilot interior a real location and the series one a set? Also the Johnson house seems to change. In the pilot it is really dark, the lighting naturalistic. Also the view of the Great Northern when Leland gets the Bad News is never reprised in the series. When we see Ben arguing with the Norwegians outside, again we never see that view again in the series.

"What credit card do you want to put that on?"
"Caash, prease."

InTwinPeaks.com

Yeah, forgot to mention that since we were talking about the Packards.

Montana, check out the link in Charles' signature line if you haven't already. Good stuff! 

"What credit card do you want to put that on?"
"Caash, prease."

QUOTE:The RR is the major one for me. It doesn't even look like the same place.

FROM THE PILOT (ON LOCATION AT THE MAR-T-CAFE):

FROM THE SERIES (ON A SET):

FROM FWWM (ON LOCATION AT THE MAR-T-CAFE):

InTwinPeaks.com

They did a better job than I thought they did. But I'm somehow glad that those strange neon rectangles on the ceiling weren't replicated anyway.

edit: And what happened to the floor? Clearly, they didn't go for a faithful copy when it came to the diner. The Great Northern and the interiors at the Packards' on the other hand look exactly like in the pilot.

"What credit card do you want to put that on?"
"Caash, prease."

InTwinPeaks.com

"What credit card do you want to put that on?"
"Caash, prease."

Here are some side-by-side comparisons of screen captures of the Packard/Martell residence and Great Northern from the pilot, then the series (left to right):

InTwinPeaks.com

"What credit card do you want to put that on?"
"Caash, prease."

Totally. The G.N feels just right... RR not so much, though I still love it.

InTwinPeaks.com

I guess this fits here. A comparison of the brief shot of Coop's room seen in the alternative ending of the Pilot and a scene from ep.2. Except for some details (like the shotgun or the lamp) they did an excellent job recreating the room...specially for a shot that wasn't even in the broadcasted Pilot. Good thing we have the Gold Box and its excellent image quality for that ending...

Here's Coop's room when he receives the OAM's phone call in the infamous Pilot's alternative ending:

And in ep.2 when he's talking to Hawk:

You know you're a Twin Peaks Freak when...

...your children invent nicknames for single-episode bit part actors.

"What credit card do you want to put that on?"
"Caash, prease."

"What credit card do you want to put that on?"
"Caash, prease."

Yes, it's different.

http://www.moreintwinpeaks.com/2007/03/real-johnson-rsidence.html