I believe this bench top is by Halifax Vogel and is known as crea style AR + gloss finish the colour name is everest. I can't be 100% as your image is not clear close up, but I'm almost 100. I will say, from experience in kitchen fit outs, 1000s actually, complementing a dating bench top won't save money, they have to remove the existing top to join the new section regardless, this is time and money on site,often dearer than just removing it and measuring for a new modern decor. Go with a new bench too selection, so it is worth your effort extending your kitchen, invest in a new top and treat it as an investment. If you don't and the end result is not great you risk losing money on this kitchen.

Just remember that good quality tapware is EXPENSIVE and so is the plumber to change out the tap so go for the best you can afford - tapware will either make or break the look you're going for in terms of big ticket items. But go for what you want - infact take a sample of your benchtop and put it next to the tap and a stainless steel appliance in the Ikea showroom and have a look to decide for yourself - it all depends on personal taste.

Hi, It does not have to be the same white in a white on white scheme but the same white will work.

I like the dark stainless but found that not all the appliances I’m researching are available in all finishes. Stainless was universally available and the same colour across brands eg the dark stainless is different between manufacturers. Don’t forget your microwave and coffee machine too if they are also on show.