You may have already read our (thrilling) guide to the different mattresses made by Emma. You enjoyed the highs and lows as we discussed the different types of foam, the number of springs and other fascinating topics.

But just when you thought you understood the Emma range of mattresses…you discover that they sell completely different mattresses at John Lewis.

Here’s our guide to those mattresses.

All of the Emma mattresses sold at John Lewis are medium firmness.

Here’s my brief summary, from cheapest to most expensive:

• Emma Select Smart Hybrid Mattress (££) uses a mix of springs and foam (which is why it’s called a hybrid). The design is simpler than the mattresses you buy direct from Emma. It doesn’t use any memory foam but it’s got a layer of foam mixed with gel, which is another strategy to keep you cool. There is then another layer of ‘comfort foam’ which sits on top of a layer of springs. You get a trial period and a 10 year warranty with this one.

• Emma Helix Hybrid Mattress (£££) is similar to the Emma Select Smart Hybrid Mattress (££). They have basically added a couple of centimetres to the depth to make the foam layers deeper. They’ve also changed the type of foam under the springs.

• The Emma Diamond Spring Free Mattress (££££) is radically different in design. My jaw hit the floor when I saw this one (Ed: really?). With this model, Emma has returned to its foamy roots and scrapped the springs altogether. This appears to be the more modern version of the Emma Original.

• Finally, we have the Emma Diamond Hybrid Mattress (££££). You get springs but you also get a layer of foam with graphite to help keep you cool. There’s also a base layer of foam to put the springs into a lovely comfy sandwich.

So, which Emma mattress sold at John Lewis should I buy?

This is a little trickier, as all the Emma mattresses sold at John Lewis are the same firmness level so we can’t use that as a means of narrowing down the options.

They all make some attempt at keeping you cool and none of them use memory foam as the top layer of foam.

The Emma Diamond Spring Free Mattress (££££) and the Emma Diamond Hybrid Mattress (££££) are obviously the premium models. The hybrid version will give you a more familiar bouncy feel that you will be used to if you have previously owned pocket sprung mattresses. The 100% foam ‘Spring Free’ version will feel more like the Emma Original.

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