Hi, I wonder if anyone can assist?

We have booked an ocean verandah room when we travel in mid April - and wonder what people think to

1 - a budget difference in cost for 4 nights between these two room types - incase we can upgrade when we get there?

2 - chance of the option to upgrade when we get there - bearing in min arrive 18th of April.

We may be lucky and get a view but I wondered what our options were. Any advice? We have not booked directly with the hotel, but an agent in the UK.