#include <bits/stdc++.h>

using namespace std;

void test_case(int tc){
    int n;
    cin >> n;

    vector<int> a(n);
    vector<int> b(n);

    for (size_t i = 0; i < n; i++){
        cin >> a[i];
    }

    for (size_t i = 0; i < n; i++){
        cin >> b[i];
    }

    bool result = true;

    int exactdif = INT32_MAX;
    int hightestdif = 0;
    bool onlyzeroes = true;

    for(size_t i = 0; i < n; ++i){
        auto ax = a[i], bx = b[i];
        auto d = ax - bx;

        if(bx == 0){
            hightestdif = max(hightestdif, d);
        } else {
            onlyzeroes = false;
            if(exactdif == INT32_MAX){
                exactdif = d;
            } else if(exactdif != d){
                result = false;
                break;
            }
        }
    }

    if(hightestdif > exactdif){
        result = false;
    }
    
    cout << (result || onlyzeroes ? "YES" : "NO") << '\n';
}



int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);

    int t;
    cin >> t;

    for(int tc = 1; tc <= t; ++tc){
        test_case(tc);
    }

    cout << flush;

    return 0;
}