Really quick explanation of the differences here, you have the RDA (Rebuildable Dripping Atomizer) and the RTA (Rebuildable Tank Atomizer). Many RDAs do not have a huge liquid capacity and would be required to be held upright most of the time to avoid leakages as they do not have a "tank/container" to hold the liquids in. It is called a RDA/dripper because you will be required to refill the liquids after a few vapes due to the lack of storage. RTA on the other hand will have a tank to hold the liquids hence the ability to carry/store more liquid and since it's secured it is possible to commute and move about with it tucked in your bag without the fear of spillages. With that being said, some RTAs have the tendency to leak despite it's intended design so I wouldn't say all RTAs are leak proof. However as stated earlier, main difference is RDA = drip e-liquid/juice after every few puffs and RTA = higher liquid capacity.

Also the term Rebuilable means that you are able to rebuild your coils which is different from tanks such as the Aspire Nautilus and Subtank Mini as they have replaceable coils (except when a rebuildable deck if provided, in this case the Subtank Mini)

Thanks for the clear explanation, since you say RDA need drip juice after every few puff, how bout RBA? Is it same case with RTA?

Aspire replaceable coils also last as long as normal coils right or longer?

RBA = Rebuildable Atomizer / RDA = Rebuildable Dripping Atomizer / RTA = Rebuildable Tank Atomizer.
When they say RBA it means it's a rebuildable and basically it's like a blanket term for RDAs and RTAs.

I cannot confirm if Aspire replaceable coils last longer than replaceable coils of other makes but generally coils that are built/rebuildable will have a longer shelf life if you maintain it. I haven't read your previous posts and I assume you have not started vaping and if that's the case, don't jump into rebuildables just yet but rather try out a set with changeable coils until you're ready

Try putting a little bit more cotton as you wick the coils.
May be that will help, how many watts are you vaping?

The Cthulhu RTA is just a Goblin with top fill. But I think its got a big tank. Goblin users are using the small tank for better flavour. I'd rather wait to see what UD has to offer- Goliath V2(shorter) or the rumored single coil tank.
I passed on the Goliath V1 cos its too big and ordered more Goblins instead.

yeah put more cotton. But if you smoke high vg based, less cotton or else less smoke when u vape. PG based liquid thinner. maybe thats why ur chamber flooded which result in spitting.

I'm now using eGrip and RBA case, try use a week with this RBA then change to stock Joyetech base see what's the difference.

If I were to upgrade I will choose changeable coil more than ready made one. Outside service one RM5 while ready made one is terrible expensive 

Not a cheap hobby I'd say. Salute for those who spend a lot on vaping.

Since you're into eGrip's RBA, you will encounter leaking juices from the bottom of the airflow hole... Please ensure that you stuff more cotton to the coils, enough to cover 2 out of 4 liquid holes... That will stop leaking...

I almost gave up on eGrip many, many times until I found the solution... The last attempt cost me like 3 hours and quarter bottle of Rude Beer liquid.... 

Yup but egrip has the RBA part too. 

I think nautilus bvc coil is rm65 per pack of 5

Noted !

If i am putting high VG liquid into my subtank , is it better to make standard coils ? ( spaces between each rep )

Yes! there is a leak after I fill up but after that no more. If use stock base will it leak?

Wow, that's a lot of waste. How's the Rude Beer juice btw? Seems like that and bandung flavour is best seller.

Guys, thinking of giving tis a try.... Is egrip ok for a beginner.... I smoke about 10-15 sticks a day...not hard core...
Can u guys give me link to how to maintain an egrip, how to fix it ....
Another Q ...sorry if it's dumb.... But since these liquids are sweet in flavor...will it add to diabetes... Just a query...thanks....

Keypad, try a Veritas instead. I'm tired of RDAs that leaks. I'm using the Venturi RDA which is pretty leak proof but I find the airflow a bit restrictive. The Veritas will give you good flavour, decent clouds and is relatively leak proof.