How does this compare with the Diono Radian or Diono Rainer when rear facing?

Hi Olivia, Thank you for your enquiry. To compare the Britax Boulevard Click Tight, Diono Radian and Diono Rainier you can use our Product comparison option available online. To do this, If you select the ADD TO COMPARE option underneath each of the product images of the seats you are interested in, then click on “product comparison” highlighted in the green box, this will then display all these products against one another to enable you to see the differences. For further specifcation information we would recommend contacting your nearest Baby On The Move Store. If you follow the link https://www.babyonthemove.co.nz/store-locations/ this will take you to our online store finder where you can find contact details for all our stores. Here, one of our expert Car Restraint Technicians can assist in helping you to find the right car seat for you, your child and your vehicle. We hope this has helped with your query.