Comfort is very subjective and there are no universal standards in the UK, hence there are different interpretations. The Crystal bedstead mattress is not one of our core range products and therefore, does not feature on our website.
The Lilliput is a tufted mattress which will give the mattress a firmer feel compared to the Crystal mattress from mattressonline.co.uk which is microquilted.
You will have to contact the retailer to see whether or not they offer a "trial" period with full refund.