I had my car at a shop to get the floors replaced, they completed one side, then their welder quit and my car sat at the shop for two years.  I took it to another shop and they finished the other side. 
  
Now the two sides look very different.  I'm wondering which is better and if I should do anything.  Should I smooth out welds, apply seam sealer, etc.  
  
The original shop did not use seam sealer, they welded a continuous bead around the whole panel.  The second shop, it looks like they did spot welds and then used seam sealer.  I could probably take it back to the second shop and ask them to improve it, or I could clean it up myself, but I don't have a welder.  
  
Any advice is appreciated.  I have posted several photos below, I have numbered the photos, it should be obvious which side is which.  I want the car to last a long time as well as look good if a potential future buyer puts it on a lift to look at it. 
  
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