No, there a subtle differences..............at a casual glance they look the same, but upon closer comparison you can see the differences. What are those differences, you ask? I don't have any nearby to use for example, though I do have each, so you'll just have to take my word for it......or not.
The '38 Standard resembled the '37. It should be pretty close to a bolt on. I haven't done it yet but from what I understand it is pretty close to a bolt on if not a direct bolt on. Pretty easy to mistake a '38 Standard for a '37. But as has been mentioned there are subtle differences.
'37 Clip will fit directly on a '38. I've NEVER seen a full set of '38 Standard front sheet metal for sale at a swap meet in the last 30 years compared to TONS of '37s. Also note- '38 STANDARD and '38 DELUXE front fenders are different as well!