I look at this picture
and I can not understand who was born first and who was cloned
Only clearly visible large premine and attempt to play on the famous name whose is remembered many Dutch people
or is it the same developers have launched two similar coins that would collect more bitcoins for them?
All Altcoins are clones and Bitcoin is their parent. You can track all changes from that moment on github.
Electronic gulden was first : Block 1 = 2014-03-19 12:17:12 : https://chainz.cryptoid.info/efl/block.dws?1b0122efc2c3fc3cb314468ab8e157146827ea55d0535d2c342e2bbd82fb467c.htm
Guldencoin came second : Block 1 = 2014-03-29 12:09:22 : https://explorer.gulden.com/#/block/756e5147f48e143f7468b881571ac947f39950819c82d8d17ee7ceaa8e3a6628
We suppose the second caused the confusion by selecting a similar name. Later (only this summer) they obtruded further by changing their name from guldencoin to gulden
Conception of Electronic Gulden was done by an anonymous group that spend half of the premine on the project but they retreated because the project grew too big. They handed over the entire project, without keeping a single EFL, to the community that formed a non-profit foundation : Electronic Gulden Foundation. The purpose of the foundation is to maintain the network, to educate and to distribute the remaining premine to new audience within the dutch community.
Conception of Guldencoin was done by a group of four, as they presented themselves at the start. Their visible constitution has thanged over time, but their identity has been withdrawn from their public website. It is unclear to us who "owns" Gulden and the access to its premine now. You might ask that question to their community and share it with us.
As buurman says we want to avoid confusion and hassle over the name. The abbreviation of e-Gulden (the official name of the coin) has allways been EFL and we have chosen to gradually adopt EFL as the official name. Talking about "abusing" the name gulden to win Dutch sentiment has hardly been done on purpose. The foundation focuses entirely on the adoption of EFL by the dutch society. We don't "market" outside and we only explain EFL on this english podium to the rest of the world. The Gulden community does the contrary. They specifically market abroad by presenting regionalized versions of their wallet, website and other presentations. Most of their talking is in english. They clearly try to thrive on international sentiment towards Dutch economic success within the actual Bitcoin community, while we focus on new adoption within the Dutch community. No need to tell who is doing the hard work. From the point of view of the Bitcoin community however, either coin is equally accessable : throuh exchanges and egulden-qt.exe