As far as the flavor goes you can't go wrong with any of them. Erlkonigin is single coil rta it is good but is a cooler vape and flavour is there, so every now and then I find myself going back to it. Flavour wise between the other two its kinda difficult, I would say they are very close. Goblin Mini would be 1st place finisher with Silverplay nano coming very very close second. But for me overall award would go to Silverplay nano, building the tank is faster and easier, you get a bell cap. Only thumbs down for Silverplay nano would be no airflow control and the short mouth piece.
I received a clone of the SP Nano today.
Here are my initial impressions.
Build quality GOOD.
Juice capacity a little more than the GMini.
Airflow more than the GMini but I am rocking it in single coil mode by plugging the unused juice wells with cotton held in place by chimney
Flavor VERY CLOSE TO THE GMini. It's a coin flip really! Definitely beats the Orchid and Kayfun Nano
Cons.
No airflow adjustment. If you want to restrict the airflow and use dual coils lower the coils to restrict airflow.
One of my negative posts had two post holes for some reason.
Have only tries the Bell cap so no comment on the glass tank. I HATE the red plastic drip tip meant for the Bell cap
PROS
Better build quality than my Goblin Mini clone.
Screws seem to be better quality than screws in the GMini clone.
Standard 510 drip tip but mine was a bit tight.
I see one BIG advantage. Standard o ring at the bottom easier to replace than the flat silicone rings for the GMini. First impression you may be able to replace with a Kayfun or Orchid O ring.
This is a possibility will confirm when I need to refill. The chimney screws into the Bell cap the way the GMini screws into the Bell cap. The GMini would often stay in the Bell cap. If the SP Nano chimney stays in the Bell cap you will be able to re wick rebuild without dumping your juice. You could also bottom fill without removing the screw EVER.
I have to say this SP Nano clone for flavor blows the doors of of Billow V2 Nano authentic I had and sold on eBay. I had the Billow V2 Nano all the way to 40 watts and could not get any flavor out of it. I had been rocking my Kayfun Nano at 12.5 watts and that is where I started the SP Nano, and the flavor was just as good as the flavor I get from the GMini.
A little more room for the coils than the Orchid and maybe the GMini. 1/4-1/2 mm Tops
Am I entirely happy with the SP
If I was designing the block with post holes for the Orchid, GMini, and SP Nano I would lower the post holes 1/2 mm or raise the block 1/2 mm above the post holes. When the post holes are open the screws get VERY wobbly and losing one of these tiny screws would be hard to find. Two or three extra threads would make the screws more secure.
Summation. I HAVE A NEW GO TO RTA. My days of Kayfuns and Orchids IS OVER.
Earlier I tried to fake a SP Nano with Kayfun Nano chimney and Bell cap. I never was able to get any flavor out if that but this is GREAT
In the beginning I thought I would hate the single piece chimney but it has won me over.