Nested structs - good or bad

Smart Contracts
1

Hello. I am wondering if nested structs are considered a good or a bad practise in Solidity and what are the pros/cons.

For example, which way of OfferCore struct is better?

struct OfferCore {
    address seller;
    //
    address sourceToken;
    uint256 sourceAmount;
    uint16 sourceChain;
    //
    address targetToken;
    uint256 targetAmount;
    uint16 targetChain;
    //
    address targetOtcMarket;
    //
    uint48 createdAt; // not necessary
    //
    bool canceled;
}

OR

struct OfferToken {
    address token;
    uint256 amount;
    uint16 chain;
}

struct OfferCore {
    address seller;
    //
    OfferToken sourceToken;
    OfferToken targetToken;
    //
    address targetOtcMarket;
    //
    uint48 createdAt; // not necessary
    //
    bool canceled;
}