There is nothing that is as frustrating as when you are trying to learn a different language entirely, especially languages like Spanish. Aquel and Ese are two types of demonstrative pronouns; both are used to refer to something distant. While both might sound like when you are using the word 'that' in the English language, there are some differences between the two. The major difference between Aquel and Ese is actually about their usage when they are pointing to a subject.
Invariably, the closeness of an object to you will determine whether you are to use aquel or ese. Aquel is used to refer to an object standing very far to your position, while ese is used to describe objects at a close range. For example, you have two balls in your room, and one is more closer to you than the other, then you use 'ese' for the one that is closer to you, while you use aquel for the other.
Both ese and aquel are demonstrative pronouns. They are two words prevalent in Spanish grammar. Ese points to an object closer to the listener, and aquel refers to something that is not close to the person listening or the speaker.
In the context of the time, ese relates to something more recent, while Raquel is used to talk about subjects in the past. Ese is proper to use when the subject becomes a concept, and it tends to float toward the listener. These two demonstrative pronouns are used to point to subjects, but the usage depends on the object's proximities.