I also have Lindstroms and several Tronex cutters and pliers. IMO the Tronex are a higher quality cutter than the Lindstroms for approximately the same money.
I have some Excelta's that are rebranded Tronex (Lindstrom and Erem as well), and I'd have to agree with your statement that the Tronex pairs have a better cutting edge than the Lindstrom's. I like the way the Erem's cut as well (equal to the Tronex based on what I own), but they don't fit my hands as well as either the Tronex or Lindstroms. So they don't get quite as high of marks as the Tronex. This likely has to do with the grips I chose though (went for the ergonomic handles rather than standard).
None of them are trash by a long shot, but given the cost, the Tronex do seem to have a better overall performance IMHO (really sharp and are comfortable to use).
i recently bought Lindstrom EX 575E i thought it has unique design for smaller pitched components and also most people swear by the brand. the steel material is silver colored, bought direct from USA! but its been few weeks only it starts to rust at some spots, either its imitation or cannot adapt itself to my/our environment here.
They're polished steel so there's no plating that can flake off and cause problems. Good electronics tools are usually made this way, including screwdrivers and tweezers. Lindstrom does a black oxide coating on some (white, yellow, and Rx handled cutters), just not the model you purchased.
Your pair appears to be made by Ideal-Tek (Swiss made would be your clue, as those Lindstrom actually produces themselves, are made in Spain and isn't marked on the tool, only the packaging). Ideal-Tek also supplies all of Lindstrom's tweezers.
Older Lindstrom's were made in Sweden, but were bought out by Sandvik who moved production to Spain, then Snap-On bought it from Sandvik. The newer ones aren't as good as the older Swedish made ones IMHO.